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Created attachment 18979 [details]
Sample project demonstrating the issue
A TableView control, with a ViewCell that is a Grid containing a picker.
When used in a Windows 8.1 project, and you select an item using the picker, the selected item is not displayed.
When the app is resized, the selected item appears.
When used in a UWP project, it seems to have the same behaviour, even when not used in a grid, but also in a stacklayout or directly in a viewcell.
<Label Text="Picker in TableView+Grid+ViewCell" />
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" />
<Label Grid.Column="0" Text="Choose" />
<Picker Grid.Column="1" x:Name="pickerInGridInTableView">
I just found this workaround that seems to work for me:
private void Pckr_SelectedIndexChanged(object sender, EventArgs e)
var p = (Picker)sender;
p.IsVisible = false;
p.IsVisible = true;
Considering TableView is going to go away eventually, I'm not sure if I'd expect a fix to this soon or at all.
This should be fixed in 2.3.5.
Verified on xamarin.form version 18.104.22.1686-pre6
ScreenCast link : https://www.screencast.com/t/qO0ZUsINyz